David Smith's compilation of Central Speed Ranking at the two prior 2019 roadracing circuits, Sonoma and Watkins Glen, is below. The rankings are based on green flag lap times adjusted to exclude crash damage, pit stops, and other anomalies.
Two races isn't much for drawing conclusions, but the data implies Matt DiBenedetto is a legit roadracing ace. The Leavine Family #95 ranks 6th fastest on road circuits versus 23rd in speed across all 28 races this year. That's a big gain on the road circuits... impressive. Martin Truex and Chase Elliott also showed their chops, IMO.
On the other hand, the best blue oval cars seem quicker on the ovals than on roadracing tracks. Harvick is 2nd fastest for the year, but only 9th quick at Sonoma and Watkins Glen. Brad K's ranking fell from 3rd to 10th, and Logano from 5th to 12th. All three drivers are pretty good roadracers, so maybe the cars have lagged behind??
[The data below is just for the two road races. Truex in the 19 was fastest at Sonoma and second quick at the Glen, so his average was 1.50. Chase Elliott in the 9 was fastest at the Glen and third quick at Sonoma, so that's 2.00 average.]
1. Joe Gibbs/19 Avg Rank = 1.50
2. Hendrick/9 Avg Rank = 2.00
3. Joe Gibbs/18 ... Avg Rank = 3.50
4. Joe Gibbs/11 ... Avg Rank = 4.00
5. Chip Ganassi/42 ... Avg Rank = 7.50
6. Leavine Family/95 ... Avg Rank = 8.00
7-t. Penske/12 ... Avg Rank = 8.50
7-t. Joe Gibbs/20 ... Avg Rank = 8.50
9. Stewart-Haas/4 ... Avg Rank = 9.00
10. Penske/2 ... Avg Rank = 12.00
11. Chip Ganassi/1 ... Avg Rank = 12.50
12. Penske/22 ... Avg Rank = 14.00
13-t. Stewart-Haas/14 ... Avg Rank = 15.00
13-t. Hendrick/24 ... Avg Rank = 15.00
13-t. Stewart-Haas/41 ... Avg Rank = 15.00
16. Roush Fenway/17 ... Avg Rank = 15.50
17. Hendrick/88 ... Avg Rank = 16.50
18-t. Hendrick/48 ... Avg Rank = 17.50
18-t. JTG Daugherty/37 ... Avg Rank = 17.50
20. Stewart-Haas/10 ... Avg Rank = 18.00
21. Roush Fenway/6 ... Avg Rank = 18.50